How does PageSourceSearch know what citycode.ai is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of citycode.ai go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from citycode.ai?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as citycode.ai?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

citycode.ai

Built with gtag, @marimo-team/frontend 0.25.0, @feathery/react 2.98.1, recaptcha, @constructor-io/constructorio-ui-autocomplete 1.30.1, react-toastify 11.1.0, google-apis, @desivocal/agents-cdn 1.0.21, universalviewer 4.4.4, @scalar/api-reference 1.72.1, simple-mind-map 0.14.0-fix.3, @orbitellabs/chatbot-sdk 2.0.5 and more. 5 pages and 12 stored files, last crawled 2026-10-05.

rank 120,015,884 27 libraries 3 identifiers 25 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
gtag		2026-10-05
@marimo-team/frontend	0.25.0	2026-10-05
@feathery/react	2.98.1	2026-10-05
recaptcha		2026-10-05
@constructor-io/constructorio-ui-autocomplete	1.30.1	2026-10-05
react-toastify	11.1.0	2026-10-05
google-apis		2026-10-05
@desivocal/agents-cdn	1.0.21	2026-10-05
universalviewer	4.4.4	2026-10-05
@scalar/api-reference	1.72.1	2026-10-05
simple-mind-map	0.14.0-fix.3	2026-10-05
@orbitellabs/chatbot-sdk	2.0.5	2026-10-05
volantis-static	0.0.1761982841160	2026-10-05
@vitest/utils	5.0.2	2026-10-05
@gstat/leaflet-gesture-handling	1.2.8	2026-10-05
@pdftron/webviewer	12.1.0	2026-10-05
@memori.ai/memori-webcomponent	8.3.3	2026-10-05
@prefecthq/prefab-ui	0.20.2	2026-10-05
@etchteam/recycling-locator	1.78.1	2026-10-05
@waniwani/sdk	0.21.3	2026-10-05
@gradio/lite	5.45.0	2026-10-05
tia-gpc-widget	3.1.1	2026-10-05
dealposbooks	6.29.4	2026-10-05
@chainlink/cl-search-frontend	0.13.2	2026-10-05
@payment-kit-js/vanilla	0.6.6	2026-10-05
@pydantic/ai-chat-ui	2.3.0	2026-10-05
ramp-pcar	4.22.1	2026-10-05

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
Google Analytics 4 measurement id (Google)	G-NSCENDDQ0F	view source
Google site verification (Google)	yPvKDWLlf6t6et-T9ebU2c5RbyAaqc6U0ytSEdPEj3Q	view source
reCAPTCHA site key (Google)	6LeEH-wrAAAAANjRZ_ZSc5pxj5qEi98V3ej6mHqj	view source

Third-party hosts

Hosts outside citycode.ai that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
apis.google.com	connect	view source
app.posthog.com	connect	view source
broscorp.net	connect	view source
browser.sentry-cdn.com	script	view source
content-firebaseappcheck.googleapis.com	connect	view source
docs.google.com	connect	view source
eu.i.posthog.com	connect	view source
firebase.google.com	connect	view source
github.com	connect	view source
leafletjs.com	connect	view source
maps.googleapis.com	connect	view source
nominatim.openstreetmap.org	connect	view source
react.dev	connect	view source
schemas.microsoft.com	connect	view source
schemas.openxmlformats.org	connect	view source
sentry.io	connect	view source
static.parastorage.com	script	view source
unpkg.com	connect	view source
us.i.posthog.com	connect	view source
us.posthog.com	connect	view source
www.google.com	connect	view source
www.googletagmanager.com	script connect	view source
www.ibm.com	connect	view source
www.w3.org	connect	view source
yandex.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 12) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://apis.google.com/js/api.js	js library	not fetched	2026-10-05	2026-10-05
https://www.google.com/recaptcha/api.js	js library	not fetched	2026-10-05	2026-10-05
https://www.google.com/recaptcha/enterprise.js	js library	not fetched	2026-10-05	2026-10-05
https://www.google.com/recaptcha/enterprise.js?render=	js library	not fetched	2026-10-05	2026-10-05
https://www.google.com/recaptcha/enterprise.js?render=explicit	js library	not fetched	2026-10-05	2026-10-05
https://www.googletagmanager.com/gtag/js?id=G-NSCENDDQ0F	js library	not fetched	2026-10-05	2026-10-05
https://app.citycode.ai/assets/index-DNQluWjT.js	js	1.9 MB	2026-10-05	2026-10-05
https://app.citycode.ai/signup	html	501 B	2026-10-05	2026-10-05
https://www.citycode.ai/resources	html	1.3 MB	2026-10-05	2026-10-05
https://www.citycode.ai/travaux-maison-regles-urbanisme	html	1.3 MB	2026-10-05	2026-10-05
https://www.citycode.ai/pricing	html	1.4 MB	2026-10-05	2026-10-05
https://www.citycode.ai/	html	1.6 MB	2026-10-05	2026-10-05

Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-05 first crawl

5 pages, 12 files, 7.5 MB; 27 libraries, 3 identifiers, 25 third-party hosts
27 libraries added
- gtag
- @vitest/utils 5.0.2
- @pydantic/ai-chat-ui 2.3.0
- universalviewer 4.4.4
- @orbitellabs/chatbot-sdk 2.0.5
- @constructor-io/constructorio-ui-autocomplete 1.30.1
- @waniwani/sdk 0.21.3
- @chainlink/cl-search-frontend 0.13.2
- @marimo-team/frontend 0.25.0
- react-toastify 11.1.0
- @etchteam/recycling-locator 1.78.1
- dealposbooks 6.29.4
- and 15 more
3 identifiers added
- G-NSCENDDQ0F Google Analytics 4 measurement id
- yPvKDWLlf6t6et-T9ebU2c5RbyAaqc6U0ytSEdPEj3Q Google site verification
- 6LeEH-wrAAAAANjRZ_ZSc5pxj5qEi98V3ej6mHqj reCAPTCHA site key
26 third-party hosts added
12 files added

Questions about citycode.ai

How does PageSourceSearch know what citycode.ai is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of citycode.ai go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from citycode.ai?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as citycode.ai?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.